Sign panel



FIG. 1 is a perspective view showing the front, top and right sides of the sign panel;

FIG. 2 is a front elevation view of the sign panel, the rear elevation view being identical;

FIG. 3 is a right side elevation view of the sign panel, the left side elevation view being a mirror image thereof; and,

FIG. 4 is a top plan view of the sign panel.

The bottom plan view is plain and unornamental and not part of the claimed design. 

CLAIM The ornamental design for a sign panel, as shown and described. 